Icelandair posted a promotion today that if you stopover in Iceland en route to more than 20 European destinations, you will get your first night free at the Reykjavik Natura Hotel.

Fly from Boston to London for less than $450 Roundtrip. Or NYC to Stockholm for $579. Or D.C. to Amsterdam for $619. Or Seattle to Frankfurt for $719. All, and more, with stopovers in Iceland.

The travel period is Nov. 13 to Dec. 11, and tickets must be purchased by Aug. 11.

Having just researched some of these flight prices, with and without Iceland stopovers, they're good deals.